com.xilinx.rapidwright.util.performance_evaluation

Class PerformanceEvaluation

Object

com.xilinx.rapidwright.util.performance_evaluation.PerformanceEvaluation

public class PerformanceEvaluation
extends Object

Take a unrouted or partially routed design, route it in Vivado with auto generated timing constraints to find the maximum clock frequency the design supports. The minimum clock period is found via a three-stage approach, where each stage consists of a number of Vivado runs:

• Route at user-provided frequency
• Calculate new period a bit tighter than what was achieved. In 0.05ns increments, schedule runs around that center
• Search between the best result where the constraints were met and the best result where the constraints were not met. This schedules runs in 0.002ns increments

The number of runs can be quite large, so using LSF is recommended. This tool only changes timing constraints of one user-specified clock input. Other clocks should already have timing constraints assigned to them before passing the design to this tool.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PerformanceEvaluation.RouteRun

Constructor Summary

Constructors

Constructor and Description
PerformanceEvaluation(Path workDir, Path dcp, boolean reuseExistingResults, String clkPortName)

Method Summary

Modifier and Type	Method and Description
PerformanceEvaluation.RouteRun	createRouteRun(double clockPeriod)
static Pair<TimingResults,TimingResults>	getMaxFrequency(Design design, String clockPortName, Path workDir, boolean reuseExistingResults, double estimatedMaxFreqMhz)
static Pair<TimingResults,TimingResults>	getMaxFrequency(Path dcp, String clockPortName, Path workDir, boolean reuseExistingResults, double estimatedMaxFreqMhz)
static void	main(String[] args)
static double	roundDownTo(double value, double increment)
static double	roundTo(double value, double increment)
static double	roundUpTo(double value, double increment)
Pair<TimingResults,TimingResults>	run(double estimatedMaxFreqMhz)

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PerformanceEvaluation

public PerformanceEvaluation(Path workDir,
                             Path dcp,
                             boolean reuseExistingResults,
                             String clkPortName)

Method Detail

createRouteRun

public PerformanceEvaluation.RouteRun createRouteRun(double clockPeriod)

roundDownTo

public static double roundDownTo(double value,
                                 double increment)

roundUpTo

public static double roundUpTo(double value,
                               double increment)

roundTo

public static double roundTo(double value,
                             double increment)

run

public Pair<TimingResults,TimingResults> run(double estimatedMaxFreqMhz)

getMaxFrequency

public static Pair<TimingResults,TimingResults> getMaxFrequency(Path dcp,
                                                                String clockPortName,
                                                                Path workDir,
                                                                boolean reuseExistingResults,
                                                                double estimatedMaxFreqMhz)

getMaxFrequency

public static Pair<TimingResults,TimingResults> getMaxFrequency(Design design,
                                                                String clockPortName,
                                                                Path workDir,
                                                                boolean reuseExistingResults,
                                                                double estimatedMaxFreqMhz)

main

public static void main(String[] args)
                 throws FileNotFoundException

Throws:

FileNotFoundException